myaa0902
myaa0902 myaa0902
  • 17-12-2018
  • Mathematics
contestada

the area of a circle is 196 pi square inches. what is the exact length of the circle's radius?

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reneag0985
reneag0985 reneag0985
  • 17-12-2018

Answer:

98

Step-by-step explanation:

C = 2πr


--->   196π  =  2πr                          (Now, divide both sides by 2π:

--->   196π / (2π)  =  2πr / (2π)

--->   98  =  r

Answer Link
itmye84 itmye84
  • 17-12-2018

Area of a circle:

[tex]A=\pi r^2[/tex]      "r" is the radius


Since you know [tex]A=196\pi[/tex] in², you can plug (196[tex]\pi[/tex]) for "A" in the equation

[tex]A=\pi r^2[/tex]

[tex]196\pi=\pi r^2[/tex]  Divide pi on both sides

196 = r²     Square root both sides

14 = r

Answer Link

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